Anyone have any experience with these? I only recently started paying attention to them and they appear to have a few good qualities.
I believe that most BUIS are over-engineered and perhaps a decent sight could be fashioned from a hunk of whittled popsicle stick and a rubber band. Well, maybe not, but most BUIS have waaaay too much built in. Not that I’m complaining.
I agree with the review referenced below that four apertures are probably not necessary. The sight appears to be rather high, even when folded, for low mounted optics without a lot of eye relief. I would probably wish that the sight locked in the up position. And the fastening nut does look rather large for its purpose.
But, a few things may make a great difference. Of all the BUIS I have seen, I would have no qualms about making it a stand-alone primary iron sight; it looks robust as hell. Also, I have never liked the penchant for designers to place the lateral/azimuth adjustment knob on the portion of the sight that flips up. Why is that sucker hanging at the top of the sight like that? I prefer adjustment knobs attached to the base, like the GG&G MAD sights, MATECH, or Hahn. The 360 Series has this feature.
Anyone have any experience or comments? There’s a review at:
A friend of mine has one on his Armalite and he likes it a lot. It’s very solid and well built. Although it doesn’t lock in the up or down position it has a pretty strong spring and detent holding it in place. The mounting nut is a little on the large size and a bit of over kill but very strong and you can use either a flat tip screw driver or socket to tighten it down. Turning the drum feels solid and clicks well into place. Once sighted in at 100yd it’s also dead on at 200 and 300 with 55gr loads (using the appropriate aperture). My only complaint is that when I use it on the large aperture, the top part of the circle fades out and instead I see more of a U then a nice round circle.
I have the other Brownells sight and one time when I went to charge my charging handle with my left index finger I grabbed the nut of the sight instead. It only happened once.
“I find HK style sights on the AR15 to be philisophically repulsive.”
I sport a pair of HK sights on one of my builds for two reasons; one, I carried HK SMG’s for a couple of years and find the sights to be very fast, second, they are a big FU to the Coltanati.
I am going to try to work this out, but this is from Brownell’s website:
360 Series Rear - 1-3⁄8" overall length, 1-7⁄8" high (extended), 13⁄16" (3cm) high (folded). Trajectory calibrated for carbines with 16" long barrel equipped with A2 front sight or sights of equivalent height.
With an ACOG, that will depend in part on the mount you are using. Using the never exact but sometimes useful Mark 1 eyeball and ruler test, the distance from the bottom of a LaRue LT-105 to the bottom of a compact ACOG ocular “eyepiece/bell” is about 1.1". The distance from the bottom of a ADM B2 to a compact “eyepiece/bell” is about 1".
So, if these measurements are correct, the eyepiece will clear the sight when folded. How your eye will react to its placement is another question.
[Please note that the measurements are from the bottom of the mount, not the rail. I am assuming that this is the best way to compare to Brownell’s measurements, which apparently are from the bottom to the top of the sight, including its rail connection/mount.]
While I haven’t used this particular system, I am a HK MP-5 sub-machinegun operator/instructor, and while the diopter-style HK sighting system can be fast, I don’t particularly care for it. I much prefer the more “traditional” AR-style sighting system. I also fail to see how having a rotary-diopter system with 4 different apertures on a drum is simpler than a Magpul MBUS or Troy BUIS.
